Given Bethesda's track record with promotional bags, you probably bought the higher-quality item.

Is this one actually made of canvas?

Cough cough where? Cough

The Smithsonian National Atomic Testing Museum in Las Vegas had an extensive exhibit on the Fallout franchise including full sized mock ups of the in-game vault rooms. This is an official Bethesda display.

The gift shop also had Vault tech merch items when I was there in November.